21401103120 has 40 divisors (see below), whose sum is σ = 66343420416. Its totient is φ = 5706960768.

The previous prime is 21401103103. The next prime is 21401103133. The reversal of 21401103120 is 2130110412.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21401103120.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44585392 + ... + 44585871.

Almost surely, 2^21401103120 is an apocalyptic number.

21401103120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21401103120 is an abundant number, since it is smaller than the sum of its proper divisors (44942317296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21401103120 is a wasteful number, since it uses less digits than its factorization.

21401103120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89171279 (or 89171273 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21401103120 its reverse (2130110412), we get a palindrome (23531213532).

The spelling of 21401103120 in words is "twenty-one billion, four hundred one million, one hundred three thousand, one hundred twenty".